Paralympian Mark Colbourne announces retirement

The 43-year-old cyclist has announced his retirement from the sport Credit: David Davies/PA Wire

Paralympic gold-medallist Mark Colbourne has announced his retirement from the Great Britain Para-Cycling Team.

The 43-year-old, who joined the team in 2011, made his Paralympic debut at London 2012, winning gold in the individual pursuit, silver in the kilo on the track, and silver in the time-trial on the road.